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Danielle M. Fitzgerald, Robert J. Spence, Zachary K. Stewart, Peter J. Prentis, Martin N. Sillence, Melody A. de Laat
J Exp Biol (2020) 223 (7): jeb219154.
Published: 1 April 2020
... that metabolically healthy ponies have greater microbial stability when challenged with this dietary change, compared with ponies with insulin dysregulation. 16S rRNA Hindgut Horse Glucagon-like peptide-1 Equine metabolic syndrome Endocrine The equine gastrointestinal microbiome, like...
Includes: Supplementary data
In collection:Comparative biomechanics of movement
J Exp Biol (2019) 222 (16): jeb204107.
Published: 23 August 2019
...Zoe T. Self Davies; Andrew J. Spence; Alan M. Wilson ABSTRACT The horse has evolved to gallop economically at high speed. Limb force increases with speed but direct measures of limb ground reaction forces (GRFs) at gallop are sparse. This study reports GRFs for multiple limbs, using force plates...
J Exp Biol (2011) 214 (1): 104–112.
Published: 1 January 2011
.... This research suggests that breed-specific growth rates influence the maturation of the neural networks generating chewing rhythm, which may be altered because of changes in jaw mass during early postnatal growth. Here, we explored the intraspecific scaling of CCD within a sample of adult horses ranging from...
J Exp Biol (2009) 212 (15): 2454–2463.
Published: 1 August 2009
... limitations to this approach. Firstly, the inverse dynamics calculations used inertial properties of the equine forelimb taken from Buchner et al. ( Buchner et al.,1997 ). These inertial properties are based on Dutch Warmblood horses that had a slightly greater body mass and slightly heavier limbs than...
Includes: Supplementary data
J Exp Biol (2008) 211 (24): 3836–3849.
Published: 15 December 2008
..., thoroughbred horses and elite human athletes. In each case, an absolute speed limit is definable, and the current record approaches that predicted maximum. While all such extrapolations must be used cautiously, these data suggest that there are limits to the ability of either natural or artificial selection...
J Exp Biol (2008) 211 (6): 945–956.
Published: 15 March 2008
... increases with the PE of the animal. In this study we investigate the mechanical energy ( ME ) fluctuations and the mechanical cost of transport (MCT) in six horses galloping up a range of gradients. We captured trunk movement with a six degrees-of-freedom inertial sensor mounted over the dorsal spinous...
J Exp Biol (2008) 211 (6): 935–944.
Published: 15 March 2008
... locomotion would enhance our understanding of locomotor powering during changes in terrain. This study measured foot-on and foot-off times from galloping horses using a previously validated system of limb-mounted accelerometers and a global positioning system data logger. A detailed track survey provided...
J Exp Biol (2007) 210 (16): 2795–2800.
Published: 15 August 2007
... a continuous scale of colours or does the neutral point divide their chromatic space into two colour categories, i.e. into colours of either short or long wavelengths? We trained horses to different colour combinations in a two-choice behavioural experiment and tested their responses to the training and test...
J Exp Biol (2006) 209 (21): 4389–4397.
Published: 1 November 2006
.... Rev . 3 , 10 -12. Barrey, E., Galloux, P., Valette, J. P., Auvinet, B. and Wolter,R. ( 1993 ). Stride characteristics of overground versus treadmill locomotion in the saddle horse. Acta Anat. Basel 146 , 90 -94. Björk, G. ( 1958 ). Studies on the draught forces of horses: development...
J Exp Biol (2006) 209 (19): 3742–3757.
Published: 1 October 2006
... with fluctuations in mechanical energy, even in the most efficient animals. In this study we investigate the exchanges between different forms of mechanical energy involved in high-speed gallop locomotion in Thoroughbred race horses during over-ground locomotion using innovative, mobile data collection techniques...
J Exp Biol (2006) 209 (3): 455–465.
Published: 1 February 2006
... that they compensate for the effects of size differences. Here we apply this principle to understanding the effects of size on locomotion within a species: the domestic horse. We predict that, without any factor to compensate for size differences, detectable deviations from dynamically similar locomotion would occur...
J Exp Biol (2005) 208 (13): 2503–2514.
Published: 1 July 2005
... position using a modified version of a commercial inertial orientation sensor that combines accelerometers, gyroscopes and magnetometers, thus giving a full set of movement parameters (displacement,velocity and acceleration in three dimensions). The 35 g sensor was attached over the spine of a horse...
J Exp Biol (2004) 207 (21): 3639–3648.
Published: 1 October 2004
... rufus ), where it resulted in a 36% underestimation of GRFz predicted using equation 1 ( Kram and Dawson, 1998 ). The shape of the GRF curve in the horse, where there is an apparently simpler lever system, has not been compared to a pure sine wave. The proportion of the body mass supported...
J Exp Biol (2004) 207 (20): 3507–3514.
Published: 15 September 2004
...-to the hindlimbs in quadrupeds. However, there are no whole-animal kinetic measurements of incline locomotion. Based on previous related research, we hypothesized that there would be a shift in forces to the hindlimb. The present study measured the force produced by the fore- and hindlimbs of horses while trotting...
J Exp Biol (2004) 207 (4): 667–674.
Published: 1 February 2004
...Darren J. Dutto; Donald F. Hoyt; Hilary M. Clayton; Edward A. Cogger; Steven J. Wickler SUMMARY The ability to jump over an obstacle depends upon the generation of work across the joints of the propelling limb(s). The total work generated by one hind limb of a horse and the contribution...
J Exp Biol (2003) 206 (9): 1557–1564.
Published: 1 May 2003
...Steven J. Wickler; Donald F. Hoyt; Edward A. Cogger; Gregory Myers SUMMARY Two studies have focused on potential triggers for the trot–gallop transition in the horse. One study concluded that the transition was triggered by metabolic economy. The second study found that it was not metabolic factors...
J Exp Biol (2003) 206 (8): 1325–1336.
Published: 15 April 2003
...M. Polly McGuigan; Alan M. Wilson SUMMARY A horse's legs are compressed during the stance phase, storing and then returning elastic strain energy in spring-like muscle-tendon units. The arrangement of the muscle-tendon units around the lever-like joints means that as the leg shortens the muscle...
J Exp Biol (2001) 204 (10): 1775–1781.
Published: 15 May 2001
.... * Author for correspondence (e-mail: email@example.com ) 27 02 2001 23 04 2001 © 2001 by Company of Biologists 2001 bone Young’s modulus anisotropy nanoindentation osteone horse Equus caballus It is generally regarded almost as a truism that the architectures...
J Exp Biol (1999) 202 (17): 2329–2338.
Published: 1 September 1999
...A. E. Minetti; L. P. Ardigò; E. Reinach; F. Saibene ABSTRACT Three-dimensional motion capture and metabolic assessment were performed on four standardbred horses while walking, trotting and galloping on a motorized treadmill at different speeds. The mechanical work was partitioned into the internal...
J Exp Biol (1999) 202 (5): 543–552.
Published: 1 March 1999
...: sacrificing strength for load predictability? J. Theor. Biol. 131 , 75 – 92 . 10.1016/S0022-5193(88)80122-X Biewener , A. A. , Thomason , J. , Goodship , A. and Lanyon , L. E. ( 1983a ). Bone stress in the horse forelimb during locomotion at different gaits: a comparison...